The most westerly well in Oxfordshire, Westwell boasts a beautiful church standing in a lush green churchyard. The nave is 12th Century with later additions.
St Mary's is a small two-cell church. The nave is 12th Century, and the south porch a later medieval addition, but the nave was lengthened westwards in the 19th Century and given a a timber bell-turret towards the west end. The chancel has 13th Century windows, but some or all of the corbel-table is 12th Century